[Mikez]

Is there only anion and cation or is there a different way of classifying them?

thanks

[Alex]

I suppose you could classify ions a 'simple' and 'complex' but I would say that anion and cation is by far the most common and normal way of classifying them.

[Donaldson Tan]

polyatomic ion vs monoatomic ion

organic ion vs inorganic ion

oxy anion vs non-oxy anion

reducing ion vs oxiding ion

seriously, the list of classification cannot be exhuasted. it depends on how precise you want to be regarding the differences among different ions.